Dc power cable system comprising a repeater

Abstract

A DC power cable system including: a power cable having a conductor, an insulation system surrounding the conductor, wherein the insulation system including an inner semiconducting layer, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, an optical fiber cable extending along the power cable, a power supply lead extending along the power cable; and a repeater powered by the power supply lead and connected to the optical fiber cable, wherein the repeater is arranged to amplify an optical signal propagating inthe optical fiber cable.

1 . A DC power cable system
 comprising: a power cable having:   a conductor,   an insulation system surrounding the conductor, wherein the insulation system includes an inner semiconducting layer, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer,   an optical fiber cable extending along the power cable,   a power supply lead extending along the power cable; and   a repeater powered by the power supply lead and connected to the optical fiber cable, wherein the repeater is arranged to amplify an optical signal propagating in the optical fiber cable.   
     
     
         2 . The DC power cable system according to  claim 1 , wherein the optical fiber cable comprises two optical fiber cable sections, and wherein a first of the optical fiber cable sections is connected to a second of the optical fiber cable sections via the repeater, and wherein the repeater is configured to amplify the optical signal received from the first optical fiber cable section and to transmit the amplified optical signal to the second optical fiber cable section. 
     
     
         3 . The DC power cable system according to  claim 1 , wherein the power cable comprises a joint and two power cable sections connected to each
 other by the joint.   
     
     
         4 . The DC power cable system according to  claim 3 , wherein the repeater is arranged in the joint. 
     
     
         5 . The DC power cable system according to  claim 1 , wherein the DC power cable system comprises an armor layer arranged around the insulation system, and the power supply lead is arranged in the armor layer. 
     
     
         6 . The DC power cable system according to  claim 5 , wherein the optical fiber cable is arranged in the armor layer. 
     
     
         7 . The DC power cable system according to any one of  claim 1 , wherein the optical fiber cable is arranged in the conductor. 
     
     
         8 . The DC power cable system according to  claim 1 , wherein the power cable is an HVDC or UHVDC power cable. 
     
     
         9 . The DC power cable system according to  claim 1 , wherein the power supply lead is a low voltage power supply lead. 
     
     
         10 . The DC power cable system according to  claim 1 , wherein the power cable is a submarine power cable. 
     
     
         11 . The DC power cable system according to  claim 10 , wherein the optical fiber cable is arranged to transmit the optical signal amplified by the repeater in the submarine power cable to an onshore monitoring arrangement. 
     
     
         12 . The DC power cable system according to  claim 1 , wherein the power cable comprises a sensor, wherein the optical fiber cable is connected to the sensor and the optical signal includes sensor data. 
     
     
         13 . A DC power cable system, comprising:
 a conductor,   an insulation system surrounding the conductor, wherein the insulation system includes an inner semiconducting layer, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer,   an optical fiber cable extending along the power cable,   a power supply lead extending along the power cable; and   a repeater powered by the power supply lead and connected to the optical fiber cable, wherein the repeater is arranged to amplify an optical signal propagating in the optical fiber cable;   wherein the optical fiber cable is arranged to transmit telecommunication data.   
     
     
         14 . The DC power cable system according to  claim 2 , wherein the power cable comprises a joint and two power cable sections connected to each
 other by the joint.   
     
     
         15 . The DC power cable system according to  claim 2 , wherein the DC power cable system comprises an armor layer arranged around the insulation system, and the power supply lead is arranged in the armor layer. 
     
     
         16 . The DC power cable system according to  claim 2 , wherein the power cable is an HVDC or UHVDC power cable. 
     
     
         17 . The DC power cable system according to  claim 2 , wherein the power supply lead is a low voltage power supply lead. 
     
     
         18 . The DC power cable system according to  claim 2 , wherein the power cable is a submarine power cable.